Structural studies of adsorbed alkanethiols on Cu(111) by use of S and C K-edge X-ray absorption fine structures

被引：59

作者：

Imanishi, A

Isawa, K

Matsui, F

Tsuduki, T

Yokoyama, T

Kondoh, H

Kitajima, Y

Ohta, T ^{[1
]}

机构：

[1] Univ Tokyo, Sch Sci, Dept Chem, Bunkyo Ku, Tokyo 113, Japan

[2] Natl Inst Mat & Chem Res, Higashi Ku, Tsukuba, Ibaraki 305, Japan

[3] High Energy Accelerator Res Org, Inst Mat Struct Sci, Photon Factory, Tsukuba, Ibaraki 305, Japan

来源：

SURFACE SCIENCE | 1998年 / 407卷 / 1-3期

关键词：

alkanethiol; CH3(CH2)(5)SH; CH3(CH2)(11)SH; Cu(111); NEXAFS; surface; EXAFS;

D O I：

10.1016/S0039-6028(98)00217-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Surface structures of submonolayer alkanethiol CH3(CH2)(n-1)SH (n=6,12) adsorbed on Cu(111) at room temperature (0.3 ML) were investigated by means of S K-edge surface extended X-ray absorption fine structure (EXAFS) and S, C K-edge near-edge X-ray absorption fine structure (NEXAFS) spectroscopies. Polarization dependence of the C K-edge NEXAFS spectra revealed that alkanethiol molecules adsorb with the tilt angle of 12+/-10 degrees from the surface normal. The S K-edge surface EXAFS determined that the S-Cu distance is 2.31+/-0.02 Angstrom and that the S atoms locate at a deep three-fold hollow site with significant lateral outward movements of the nearest neighbor Cu atoms. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：282 / 292

页数：11

共 32 条

[1] SURFACE RAMAN-SCATTERING OF SELF-ASSEMBLED MONOLAYERS FORMED FROM 1-ALKANETHIOLS - BEHAVIOR OF FILMS AT AU AND COMPARISON TO FILMS AT AG [J].